Features: With double pinions drive system, it can be used smoothly and improve your work efficiency. Made of high quality steel with advanced technics, long service life. The chuck of hand crank drill is adjustable which ensures you can install drills of different sizes. Mainly used for gear and shaft sleeve and other tight parts of the removal and deformation of parts correction. Perfect for wood, bamboo, soft thin metal, plastic, PVC, acrylic, glass fiberboard, circuit board and more. Specification:Material: SteelWeight: Approx. 683g~732g / 24.1oz~25.8oz Chuck size: 1/4, 3/8 (Optional)Clamping range: 1/4: 0.6-6mm, 3/8: 1.5-10mmPackage List:1 * Hand Drill1 * Wrench1 * Drill ChuckNotice:Please allow slight error due to manual measurement. Thanks for your understanding.